Normal Open Circuit Voltage Waveform - Lincoln Electric POWER MIG SVM170-A Service Manual

F-31

NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM

20.0 V
This is a typical DC output voltage waveform
generated from a properly operating
machine. Note that each vertical division
represents 20 volts and that each horizontal
division represents 2.5 milliseconds in time.
NOTE: Scope probes connected at
machine output terminals: (+) probe to elec-
trode, (-) probe to work.
TROUBLESHOOTING AND REPAIR
POWER MIG 255C
2.5 ms
SCOPE SETTINGS
Volts/Div . . . . . . . . . . . . . . . . . . 20 V/Div
Horizontal Sweep . . . . . . . . . 2.5 ms/Div
Coupling . . . . . . . . . . . . . . . . . . . . . . DC
Trigger . . . . . . . . . . . . . . . . . . . . Internal
F-31
0 VOLTS